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Physical parameter commonly used in astrophysics
The Doppler parameter, or Doppler broadening parameter, usually denoted as b {\displaystyle b} , is a parameter commonly used in astrophysics to characterize
Doppler_parameter
Austrian mathematician and physicist (1803–1853)
Austria) in 1803. Doppler was the second son of Johann Evangelist Doppler and Theresia Seeleuthner (Doppler). Doppler's father, Johann Doppler, was a third-generation
Christian_Doppler
Fleet of truck-mounted weather radars
Doppler on Wheels (DOW) is a fleet of quickly deployable truck-mounted weather radars managed by FARM (Flexible Array of Radars and Mesonets), an American
Doppler_on_Wheels
Change in wavelength of light
a blueshift. Three forms of redshift occur in astronomy and cosmology: Doppler redshifts due to the relative motions of radiation sources, gravitational
Redshift
Geodetic reference system
Satellite System (NNSS). Doppler data was also available from the numerous sites established by GEOCEIVERS during 1971 and 1972. Doppler data was the primary
World_Geodetic_System
Observation in physical cosmology
notion of a static universe. In 1912, Vesto M. Slipher measured the first Doppler shift of a "spiral nebula" (the obsolete term for spiral galaxies) and
Hubble's_law
Parameter-free superresolution algorithm
single scalar parameter θ k {\displaystyle \theta _{k}} . A typical application with the SAMV algorithm in SISO radar/sonar range-Doppler imaging problem
SAMV_(algorithm)
Radio wave detection and transmission system defined by its separation
information content in measurements of range, bearing and Doppler becomes very low (all these parameters tend to zero, regardless of the location of the target
Bistatic_radar
Meter used to measure water current velocities
An acoustic doppler current profiler (ADCP) is a hydroacoustic current meter similar to a sonar, used to measure water current velocities over a depth
Acoustic Doppler current profiler
Acoustic_Doppler_current_profiler
Change in luminosity of a moving object due to special relativity
In physics, relativistic beaming (also known as Doppler beaming, Doppler boosting, or the headlight effect) is the process by which relativistic effects
Relativistic_beaming
Laser cooling technique
physics, sub-Doppler cooling is a class of laser cooling techniques that reduce the temperature of atoms and molecules below the Doppler cooling limit
Sub-Doppler_cooling
Indirect method for finding extrasolar planets and brown dwarfs
Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets
Doppler_spectroscopy
Medical intervention
is sometimes known as Doppler auscultation. The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler and provides information
Medical_ultrasound
bat approaches a target, its outgoing sounds return as echoes, which are Doppler shifted upward in frequency. In certain species of bats, which produce
Doppler_shift_compensation
Main belt asteroid
3905 Doppler, provisional designation 1984 QO, is a stony asteroid and binary system from the middle region of the asteroid belt, approximately 8 kilometers
3905_Doppler
Form of radar used to create images of landscapes
Doppler technique. It is based on the fact that "radar reflections from discrete objects in a passing radar beam field each [have] a minute Doppler,
Synthetic-aperture_radar
Radio signal statistical model
single-path Rayleigh fading channel with a maximum Doppler shift of 10 Hz and 100 Hz. These Doppler shifts correspond to velocities of about 6 km/h (4 mph)
Rayleigh_fading
Method of spatial measurement using laser
changes of the reflected light) and coherent detection (best for measuring Doppler shifts, or changes in the phase of the reflected light). Coherent systems
Lidar
Numerical manipulation of Doppler parameters obtain during routine Echocardiography has been extensively utilized to non-invasively estimate intra-cardiac
Numerical modeling in echocardiography
Numerical_modeling_in_echocardiography
Cosmological time duration
galaxies showed a red shift in their spectral lines presumably caused by the Doppler effect, thus indicating that these galaxies were moving away from the Earth
Age_of_the_universe
French civilian geopositioning system
movement of the satellite (Doppler effect). From this observation satellite orbits, ground positions, as well as other parameters can be derived.[citation
DORIS_(satellite_system)
Weather radar tuned to cloud detection
correct the Doppler spectrum, so that the retrieved microphysical parameters can be improved and the uncertainties decreased. The skewness parameter of the
Millimeter_cloud_radar
In medicine, Esophageal Doppler or Oesophageal Doppler uses a small ultrasound probe inserted into the esophagus through the nose or mouth to measure blood
Esophageal_doppler
Photon Doppler velocimetry (PDV) is a one-dimensional Fourier transform analysis of a heterodyne laser interferometry, used in the shock physics community
Photon_Doppler_velocimetry
Feature observed in spectroscopy
functions, whose parameters are the line position, maximum height and half-width. Actual line shapes are determined principally by Doppler, collision and
Spectral_line_shape
Equations in physical cosmology
S_{-1}(r)=\sinh(r),S_{0}=1,S_{1}=\sin(r).} These three possibilities correspond to parameter k of (0) flat space, (+1) a sphere of constant positive curvature or (−1)
Friedmann_equations
1995 video game
Sigma, the heroes X and Zero must battle a Reploid scientist named Dr. Doppler and his utopia of Maverick followers. Mega Man X3 follows the tradition
Mega_Man_X3
Numeric parameter used to assess for cardiac shunt defects
Index (RAI) is a numeric parameter used to assess for cardiac shunt defects. It is calculated from the standard transthoracic Doppler echocardiogram measurements
Relative_Atrial_Index
Investigative astrophysics technique
; Wade, G. A. (2015-05-29). "First Zeeman Doppler Imaging of a Cool Star Using All Four Stokes Parameters". The Astrophysical Journal. 805 (2): 169.
Zeeman–Doppler_imaging
Strength of rotation within a vortex
Laboratory as one of the five parameters for the mesocyclone detection algorithm (MDA), it is usually found on doppler weather radar velocity. Mesocyclones
Mesocyclone_Strength_Index
Mathematical model combining space and time
connecting them (longitudinal Doppler effect), and (2) the motions are at right angles to the said line (transverse Doppler effect). We are ignoring scenarios
Spacetime
2011 EF5 tornado in Oklahoma
with peak wind speeds in excess of 210 mph (340 km/h), although a mobile Doppler radar found that the tornado possessed wind speeds of up to 295 mph (475 km/h)
2011_El_Reno–Piedmont_tornado
Dynamics of blood flow
analysis, or laser Doppler anemometry. Blood velocities in arteries are higher during systole than during diastole. One parameter to quantify this difference
Hemodynamics
Process of calculating the causal factors that produced a set of observations
mathematical problems in science and mathematics because they tell us about parameters that we cannot directly observe. They can be found in system identification
Inverse_problem
Distinctive narrow spectral feature of chemical species
velocities. Each photon emitted will be "red"- or "blue"-shifted by the Doppler effect depending on the velocity of the atom relative to the observer.
Spectral_line
Data communications modulation protocol
Doppler spread and vice versa. With appropriate parameter selection, MFSK can tolerate significant Doppler or delay spreads, especially when augmented with
Multiple frequency-shift keying
Multiple_frequency-shift_keying
Compact astronomical body
it. The mass of distant supermassive black holes can be inferred from Doppler broadening of spectral lines emitted by rapidly orbiting gas, a technique
Black_hole
Aviation navigation system
improve azimuth accuracy of VOR even under difficult siting conditions, Doppler VOR (DVOR) was developed in the 1960s. VOR is according to ICAO rules a
VHF_omnidirectional_range
Meteorological service of South Korea
Alabama won a contract to deliver 11 S-band Klystron Dual-Polarization Doppler Weather radar systems to the KMA. The radars will be installed across the
Korea Meteorological Administration
Korea_Meteorological_Administration
Measurement of blood pumped by the heart
method uses ultrasound and the Doppler effect to measure cardiac output. The blood velocity through the heart causes a Doppler shift in the frequency of the
Cardiac_output
Thought experiment in special relativity
each other at a constant rate, which places Langevin's story among the Doppler shift versions of the twin paradox. The relativistic effects upon the signal
Twin_paradox
2014 video game
Earn to Die 2 Developer Toffee Games Publisher Not Doppler Platforms iOS, Android, Microsoft Windows Release November 20, 2014 May 5, 2016 (PC) Genre
Earn_to_Die_2
2002 animated Disney film
Jim flees with Sarah and their friend, astrophysicist Dr. Delbert Doppler. At Doppler's observatory, they discover that the sphere contains a holographic
Treasure_Planet
Linear map that preserves areas
{\displaystyle (x,y)\mapsto (ax,y/a)} is the squeeze mapping with squeeze parameter a. Since { ( u , v ) : u v = c o n s t a n t } {\displaystyle \{(u,v)\
Squeeze_mapping
American meteorologist
Radars and Mesonets (FARM Facility), a research team which manages the Doppler on Wheels mobile radar fleet used to gather data on tornadoes and other
Karen_Kosiba
Theory of interwoven space and time by Albert Einstein
Newtonian mechanics. Other effects include the relativistic corrections to the Doppler effect and the Thomas precession. It also explains how electricity and
Special_relativity
Dynamic disturbance in a medium or field
that white light was a mixture of light of different colors. The Doppler effect or Doppler shift is the change in frequency of a wave in relation to an observer
Wave
Radar system using Doppler technology for 3D tracking of a sports ball in motion
The Trackman is a radar system that uses Doppler technology to track and record 3D characteristics of a sports ball in motion. Trackman was created in
TrackMan
Method used by several animal species to determine location using sound
both the prey's velocity and its movements to be detected by means of the Doppler effect. FM may be best for close, cluttered environments, while CF may
Animal_echolocation
Models of the universe which deviate from then-current scientific consensus
A non-standard cosmology is any physical cosmological model of the universe that was, or still is, proposed as an alternative to the then-current standard
Non-standard_cosmology
2D modulation technique
modulation technique that transforms the information carried in the Delay-Doppler coordinate system. The information is transformed in a similar time-frequency
Orthogonal Time Frequency Space
Orthogonal_Time_Frequency_Space
Laser cooling technique
to a Doppler shift but an induced population imbalance. Doppler cooling depends on the parameter k v Γ {\displaystyle \textstyle {\frac {kv}{\Gamma }}}
Polarization_gradient_cooling
1938 experiment confirming relativistic time dilation
relativistic time dilation to the Doppler shift of light. The result was in agreement with the formula for the transverse Doppler effect and was the first direct
Ives–Stilwell_experiment
1842 treatise by Christian Doppler
einiger anderer Gestirne des Himmels) is a treatise written by Christian Doppler in 1842 , in which he postulated his principle that the observed frequency
On the coloured light of the binary stars and some other stars of the heavens
On_the_coloured_light_of_the_binary_stars_and_some_other_stars_of_the_heavens
Mathematical model of the Big Bang
decay of supernova luminosity curves. Both effects are attributed to a Doppler shift in electromagnetic radiation as it travels across expanding space
Lambda-CDM_model
Measured time difference as explained by relativity theory
This effect of moving objects on observations is associated with the Doppler effect. Time dilation by the Lorentz factor was predicted by several authors
Time_dilation
Tornado rating system
first tornado intensity and damage scale to use measured wind speeds and Doppler weather radar measured wind speeds. When the first official publication
International_Fujita_scale
American meteorologist (born 1960)
an American atmospheric scientist and inventor known for creating the Doppler on Wheels and pioneering tornado, tropical cyclone, and weather radar research
Joshua_Wurman
1676 demonstration of light's finite speed by Danish astronomer Ole Rømer
been suggested that Rømer was measuring a Doppler effect. The original effect discovered by Christian Doppler 166 years later refers to propagating electromagnetic
Rømer's determination of the speed of light
Rømer's_determination_of_the_speed_of_light
Spatial distortion in cosmology
The effect is due to the peculiar velocities of the galaxies causing a Doppler shift in addition to the redshift caused by the cosmological expansion
Redshift-space_distortions
Poisson type distributions. The Conway–Maxwell–Poisson distribution, a two-parameter extension of the Poisson distribution with an adjustable rate of decay
List of probability distributions
List_of_probability_distributions
Measure of relativistic velocity
frames. The rapidity parameter replacing velocity was introduced in 1910 by Vladimir Varićak and by E. T. Whittaker. The parameter was named rapidity by
Rapidity
Medical condition
in the number of movements it could indicate placental deterioration. Doppler fetal monitor is a hand-held device that is routinely used in prenatal
Postterm_pregnancy
American meteorologist (1939–2025)
meteorologist to alert his viewers of a possible tornado with a commercial Doppler weather radar. He was also known for contributing to the invention of the
Gary_England
Chart of tissue blood volume changes
particular, laser Doppler holography of the eye fundus, the choroid constitutes the predominant contribution to the high frequency laser Doppler signal. It is
Photoplethysmogram
Measurement of the Earth using satellites
accurate determination of Earth's flattening. The 1960s saw the launch of the Doppler satellite Transit-1B and the balloon satellites Echo 1, Echo 2, and PAGEOS
Satellite_geodesy
Equation used in relativistic physics
Standard applications of velocity-addition formulas include the Doppler shift, Doppler navigation, the aberration of light, and the dragging of light in
Velocity-addition_formula
Haemodynamic parameter
(BSA), expressed in liters per minute per square meter (L/min/m2). This parameter provides a more accurate assessment of heart function relative to the
Cardiac_index
Speculation that the Moon is hollow
1998, the United States launched the Lunar Prospector, which hosted the Doppler Gravity Experiment (DGE) -- the first polar, low-altitude mapping of the
Hollow_Moon
Medical condition in which spasm of arteries causes episodes of reduced blood flow
been cooled. A decrease of at least 15 mmHg is diagnostic (positive). Doppler ultrasound to assess blood flow Full blood count may reveal a normocytic
Raynaud_syndrome
Nunatak group in Palmer Land, Antarctica
Nunataks and northeast of Merrick Mountains in Ellsworth Land, extending from Doppler Nunatak in the west to Arnoldy Nunatak in the east and including Mount
Sky-Hi_Nunataks
Ultrasound technique
through measuring hemodynamic (blood flow) changes. It is an extension of Doppler ultrasonography. Brain activation can be directly measured by imaging electrical
Functional_ultrasound_imaging
Resonator damping parameter
physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. Resonators
Q_factor
Satellite navigation system
receiver would receive the orbital parameters and encrypted messages from the satellite, as well as measure the Doppler-shifted frequency at intervals and
Transit (satellite navigation system)
Transit_(satellite_navigation_system)
Application of radar which is used to create two-dimensional images
techniques have evolved to do this. Generally they take advantage of the Doppler effect caused by the rotation or other motion of the object and by the
Imaging_radar
Physical effect in general relativity
locally equivalent to inertial effects and the redshift is caused by the Doppler effect) or as a consequence of the mass–energy equivalence and conservation
Gravitational_redshift
Insertion device consisting of dipole magnets
beamlines for experiments in various scientific areas. The undulator strength parameter is: K = e B λ u 2 π m e c {\displaystyle K={\frac {eB\lambda _{u}}{2\pi
Undulator
Weather research laboratory
or Hazardous Weather Testbed. NSSL meteorologists developed the first doppler radar for the purpose of meteorological observation, and contributed to
National Severe Storms Laboratory
National_Severe_Storms_Laboratory
carrier will be pulse modulated and in continuous wave systems, such as Doppler radar, modulation may not be required. Most systems use pulse modulation
Radar_signal_characteristics
Airborne weather radar specification
ARINC 708 is a specification for airborne pulse Doppler weather radar systems primarily found on commercial aircraft. ARINC 708 uses a data transfer method
ARINC_708
Israeli naval defense radar system
is positioned in one direction. The radar employs multi-beam and pulse Doppler techniques, as well as robust Electronic counter-countermeasures techniques
EL/M-2248_MF-STAR
Curve along which a 3-D surface is at equal elevation
allows map readers to infer the relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on
Contour_line
Two interrelated physics theories by Albert Einstein
and with better accuracy in 1941. It was designed to test the transverse Doppler effect – the redshift of light from a moving source in a direction perpendicular
Theory_of_relativity
low or digging wave Direct hit Directional shear Divergence Doppler on Wheels (DOW) Doppler weather radar Dry convection (or dry mixing) – A vertical exchange
Glossary_of_tornado_terms
National weather, climate, and astronomy bureau of the Philippines
not have the ability to set tornado warnings yet. Instead, they rely on doppler weather radars and storm chasers to gather data on tornadoes. The procedures
PAGASA
Use of satellite signals for navigation or geo-spatial positioning
by the US military in the 1960s. Transit's operation was based on the Doppler effect: the satellites travelled on well-known paths and broadcast their
Satellite_navigation
Method of encoding digital data on multiple carrier frequencies
in mobile communication channels affected by multipath propagation and Doppler effects. COFDM was introduced by Alard in 1986 for Digital Audio Broadcasting
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
Digital radio broadcasting standard
parameters that must be adjusted depending on propagation conditions. This is the carrier spacing which will determine the robustness against Doppler
Digital_Radio_Mondiale
Largest type of black hole
of the best evidence for the presence of black holes is provided by the Doppler effect whereby light from nearby orbiting matter is red-shifted when receding
Supermassive_black_hole
Range of physical processes in physics
electromagnetic radiation scattered by moving scattering centers does undergo a Doppler shift, which can be detected and used to measure the velocity of the scattering
Scattering
propulsion Beam diameter Beam dump Beam expander Beam homogenizer Beam parameter product Beamz Big Bang Observer Biophotonics Biosensor Black silicon Blood
List_of_laser_articles
Quantity in relativistic physics
useful property that velocity does not have. Thus the rapidity parameter forms a one-parameter group, a foundation for physical models. The Bunney identity
Lorentz_factor
Behavior of projectiles in flight
resistance effects on projectiles, Doppler radar measurements are required. Weibel 1000e or Infinition BR-1001 Doppler radars are used by governments, professional
External_ballistics
Increase in distance between parts of the universe
{\displaystyle H_{0}=H(t=t_{0})} , is the present day value of the Hubble parameter, H ( t ) {\displaystyle H(t)} , describing the dynamics of expansion.
Expansion_of_the_universe
This page describes exoplanet orbital and physical parameters. Most known extrasolar planet candidates have been discovered using indirect methods and
Exoplanet orbital and physical parameters
Exoplanet_orbital_and_physical_parameters
Concept in wireless communication engineering
by the external (to the waveform) conditions like delay spread and the Doppler set. For example: tolerating high level of the phase noise (and thus allowing
Numerology_(wireless)
Vector describing a wave; often its propagation direction
surface. A wavetrain (denoted by some variable X) can be regarded as a one-parameter family of such hypersurfaces in spacetime. This variable X is a scalar
Wave_vector
(Zak-Orthogonal Time Frequency Space) waveform, which operates in the delay-Doppler domain rather than the traditional time-frequency domain used by OFDM (Orthogonal
Pulsone
Audio signal processing technique
maintained even when Doppler frequency shifts are present on the signals. In a more recent paper slightly different parameters have been suggested, namely
Chirp_compression
Measure of neutron interaction likelihood
has to be included when calculating the cross section Equation 38. The Doppler broadening of neutron resonances is a very important phenomenon and improves
Neutron_cross_section
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